455755981 has 4 divisors (see below), whose sum is σ = 455816764. Its totient is φ = 455695200.

The previous prime is 455755961. The next prime is 455755997. The reversal of 455755981 is 189557554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189557554 = 2 ⋅94778777.

It can be written as a sum of positive squares in 2 ways, for example, as 115906756 + 339849225 = 10766^2 + 18435^2 .

It is a cyclic number.

It is not a de Polignac number, because 455755981 - 2¹¹ = 455753933 is a prime.

It is a super-2 number, since 2×455755981² = 415427028434544722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455755961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17250 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (113954191).

Almost surely, 2^455755981 is an apocalyptic number.

It is an amenable number.

455755981 is a deficient number, since it is larger than the sum of its proper divisors (60783).

455755981 is an equidigital number, since it uses as much as digits as its factorization.

455755981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60782.

The product of its digits is 1260000, while the sum is 49.

The square root of 455755981 is about 21348.4421211479. The cubic root of 455755981 is about 769.5629053545.

The spelling of 455755981 in words is "four hundred fifty-five million, seven hundred fifty-five thousand, nine hundred eighty-one".